Spotting at 11+4

Kelly • Mummy to Rosie. Miscarried at 16 week`s in June with no 2. No3 ttc
So I'm 11+4 had some pinkish spotting at work Thursday evening. So rang midwives and they booked me in epau. Had both external belly scan (couldn't pick up much) so then had internal. Baby was bouncing around. Started sucking it's thumb. Could see every little finger and toe. Massive relief (last pregnancy ended in miscarriage) this morning I woke up went toilet like usual and had a bit of brown blood /discharge... When I was examined yesterday they couldn't figure out why I've been spotting everything looked completely normal..Anyone got any guesses to why Im spotting? Anyone Been through similar.. Sorry for the essay ☺